改进的高压气枪震源气泡物理模型及其应用  

Improved model for high-pressure airgun bubble dynamics and its application

作　　者：赵迪 徐润泽 张帅 李帅[1] ZHAO Di;XU RunZe;ZHANG Shuai;LI Shuai(College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China;Department of Engineering Mechanics,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]哈尔滨工程大学船舶工程学院,哈尔滨150001 [2]浙江大学工程力学系,杭州310027

出　　处：《地球物理学报》2024年第3期1108-1119,共12页Chinese Journal of Geophysics

基　　金：国家重点研发计划(2022YFC2803500);国家自然科学基金(12372239);黑龙江省自然科学基金优秀青年项目(YQ2022E017)资助。

摘　　要：基于可压缩气泡动力学理论,建立改进的高压气枪震源气泡物理模型,其中考虑气枪气泡系统之间的物质输运效应、气液热传导等多种影响因素.改进模型的计算结果与实验数据吻合良好,且优于传统模型.在此基础上,本文分别探究了特征参数对单枪和双枪气泡动力学特性及流场压力波的影响规律.研究表明气枪开口方式是模拟压力波首脉冲的关键因素,但是对于后续的气泡溃灭脉动压力影响较小;气枪平移运动对气泡的影响可忽略不计;气枪非同步激发可在保证压力波低频段能量不降低的前提下,在一定程度上削弱高频段能量.本研究旨在为深海资源勘探新型气枪的设计提供参考.This study introduces an improved physical model for high-pressure seismic airgun bubbles, which takes into account various factors, such as fluid compressibility, mass transport, and heat transfer. Our model's pressure wave signals align well with experimental data, showcasing the superiority of this approach over conventional theories. The study examines the impact of characteristic parameters on single or double-airgun bubble dynamics and pressure fields. The findings reveal that the port opening process plays a crucial role in simulating the primary pulse of the pressure wave, while the effect of airgun translational motion on bubbles is negligible. Non-synchronous airgun firing can decrease high-frequency energy in the pressure wave while preserving low-frequency energy. The outcomes of this research may contribute to the development of new airguns for deep-sea exploration.

关 键 词：震源气泡 物质输运 压力波 频谱 

分 类 号：P631[天文地球—地质矿产勘探] P738[天文地球—地质学]